keyword
MENU ▼
Read by QxMD icon Read
search

Formaldehyde

keyword
https://www.readbyqxmd.com/read/27920190/evaluation-of-chlorine-dioxide-based-product-as-a-hatchery-sanitizer
#1
P Maharjan, S Cox, U Gadde, F D Clark, K Bramwell, S E Watkins
Formaldehyde is commonly used to overcome contaminants introduced by hatching eggs or water supply in the hatcher cabinets. However, health risks associated with its use make economical alternatives important. This project evaluated a chlorine dioxide based product (CDBP) (0.3% concentrate) as a hatchery sanitizer in decontaminating microbial populations on the shell surface of hatching eggs (>18 d old), as well as its impact on hatchability and chick performance. Hatchers (0.20 m(2)) designed to hold approximately 50 eggs and equipped with circulation fans, heaters, and thermostats were used for the evaluation...
December 5, 2016: Poultry Science
https://www.readbyqxmd.com/read/27919530/sources-of-formaldehyde-and-their-contributions-to-photochemical-o3-formation-at-an-urban-site-in-the-pearl-river-delta-southern-china
#2
Z H Ling, J Zhao, S J Fan, X M Wang
Two models (the Positive Matrix Factorization (PMF) model and a photochemical box model with Master Chemical Mechanism (PBM-MCM)) were applied to analyze the formaldehyde (HCHO) data collected in July 2006 at an urban site (GPEMC) in the Pearl River Delta (PRD), southern China. Three major HCHO sources (secondary formation, vehicular exhaust, and solvent usage) were identified and they were found to contribute in average 53%, 31% and 16% respectively to the total HCHO loading at GPEMC. Alkenes was the most important group contributing to the secondary formation of HCHO, followed by aromatics and alkanes...
December 2, 2016: Chemosphere
https://www.readbyqxmd.com/read/27918743/could-formaldehyde-induce-mutagenic-and-cytotoxic-effects-in-buccal-epithelial-cells-during-anatomy-classes
#3
D-C Lorenzoni, L-P Pinheiro, H-S Nascimento, C-S Menegardo, R-G Silva, W-G Bautz, J-F Henriques, K-L Almeida-Coburn, L-N da Gama-de-Souza
BACKGROUND: Due to increased formaldehyde exposure, carcinogenic to humans, several researches have been studying the potential toxicity and the safe levels for human beings. The aim of this study was to investigate mutagenicity and cytotoxicity in buccal epithelial exfoliated cells (BEC) of students subjected to formaldehyde (FA) during anatomy classes. MATERIAL AND METHODS: BEC were collected periodically from 17 volunteers of undergraduate programs, who had participated in practical anatomy classes, before and after FA exposure...
December 6, 2016: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/27918460/indoor-air-quality-in-the-metro-system-in-north-taiwan
#4
Ying-Yi Chen, Fung-Chang Sung, Mei-Lien Chen, I-Fang Mao, Chung-Yen Lu
Indoor air pollution is an increasing health concern, especially in enclosed environments such as underground subway stations because of increased global usage by urban populations. This study measured the indoor air quality of underground platforms at 10 metro stations of the Taipei Rapid Transit system (TRTS) in Taiwan, including humidity, temperature, carbon monoxide (CO), carbon dioxide (CO₂), formaldehyde (HCHO), total volatile organic compounds (TVOCs), ozone (O₃), airborne particulate matter (PM10 and PM2...
December 2, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27917496/time-trends-of-contact-allergy-to-the-european-baseline-series-in-lithuania
#5
Kotryna Linauskienė, Laura Malinauskienė, Audra Blažienė
BACKGROUND: Monitoring trends of positive patch test reactions is useful for epidemiological surveillance and contact allergy prevention, and has not previously been reported in Lithuania. OBJECTIVES: To examine and compare changes in the prevalence of contact allergy to European baseline series allergens in adults with suspected contact dermatitis during a 9-year period. METHODS: In this retrospective study, patch test results of 297 consecutive patients, tested with the European baseline series in 2014-2015, were analysed and compared with the data published earlier in Lithuania...
December 4, 2016: Contact Dermatitis
https://www.readbyqxmd.com/read/27917201/prevalence-of-intestinal-parasitic-infections-among-school-children-in-capital-areas-of-the-democratic-republic-of-s%C3%A3-o-tom%C3%A3-and-pr%C3%A3-ncipe-west-africa
#6
Chien-Wei Liao, Chung-Jung Fu, Cheng-Yan Kao, Yueh-Lun Lee, Po-Ching Chen, Ting-Wu Chuang, Toshio Naito, Chia-Mei Chou, Ying-Chie Huang, Idalina Bonfim, Chia-Kwung Fan
BACKGROUND: Although the Democratic Republic of Sao Tome and Principe (DRSTP) has undertaken school children-based deworming programs against intestinal parasitic infections (IPIs) using a single dose of mebendazole annually since 2005, it remains unclear as to the outcome to date. The present study intends to investigate the recent IPIs status among school children living in capital areas of the DRSTP. METHODS: A total of 252 school children (121 boys and 131 girls) of grades 4 and 5 from 4 primary schools located in the capital areas participated in the present study and their fresh fecal specimens were examined for the presence of any parasites using the merthiolate-iodine-formaldehyde concentration method as conducted...
September 2016: African Health Sciences
https://www.readbyqxmd.com/read/27915369/at-line-validation-of-a-process-analytical-technology-approach-for-quality-control-of-melamine-urea-formaldehyde-resin-in-composite-wood-panel-production-using-near-infrared-spectroscopy
#7
Roger Meder, Wolfgang Stahl, Paul Warburton, Sam Woolley, Scott Earnshaw, Klaus Haselhofer, Ken van Langenberg, Nick Ebdon, Roger Mulder
The reactivity of melamine-urea-formaldehyde resins is of key importance in the manufacture of engineered wood products such as medium density fibreboard (MDF) and other wood composite products. Often the MDF manufacturing plant has little available information on the resin reactivity other than details of the resin specification at the time of batch manufacture, which often occurs off-site at a third-party resin plant. Often too, fresh resin on delivery at the MDF plant is mixed with variable volume of aged resin in storage tanks, thereby rendering any specification of the fresh resin batch obsolete...
December 3, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27910348/demonstration-of-imaging-x-ray-thomson-scattering-on-omega-ep
#8
Patrick X Belancourt, Wolfgang Theobald, Paul A Keiter, Tim J B Collins, Mark J Bonino, Pawel M Kozlowski, Sean P Regan, R Paul Drake
Foams are a common material for high-energy-density physics experiments because of low, tunable densities, and being machinable. Simulating these experiments can be difficult because the equation of state is largely unknown for shocked foams. The focus of this experiment was to develop an x-ray scattering platform for measuring the equation of state of shocked foams on OMEGA EP. The foam used in this experiment is resorcinol formaldehyde with an initial density of 0.34 g/cm(3). One long-pulse (10 ns) beam drives a shock into the foam, while the remaining three UV beams with a 2 ns square pulse irradiate a nickel foil to create the x-ray backlighter...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27909446/functional-toxicogenomic-profiling-expands-insight-into-modulators-of-formaldehyde-toxicity-in-yeast
#9
Matthew North, Brandon D Gaytán, Carlos Romero, Vanessa Y De La Rosa, Alex Loguinov, Martyn T Smith, Luoping Zhang, Chris D Vulpe
Formaldehyde (FA) is a commercially important chemical with numerous and diverse uses. Accordingly, occupational and environmental exposure to FA is prevalent worldwide. Various adverse effects, including nasopharyngeal, sinonasal, and lymphohematopoietic cancers, have been linked to FA exposure, prompting designation of FA as a human carcinogen by U.S. and international scientific entities. Although the mechanism(s) of FA toxicity have been well studied, additional insight is needed in regard to the genetic requirements for FA tolerance...
2016: Frontiers in Genetics
https://www.readbyqxmd.com/read/27906808/the-accuracy-of-large-loop-excision-of-the-transformation-zone-specimen-dimensions-in-determining-volume-a-multicentric-prospective-observational-study
#10
Xavier Carcopino, Julien Mancini, Walter Prendiville, Jean Gondry, Julien Chevreau, Gery Lamblin, Anthony Atallah, Vincent Lavoue, Claire Caradec, Jean-Jacques Baldauf, Angélique Bryand, Sébastien Henno, Aubert Agostini, Serge Douvier, Adelaide Jarniat, Didier Riethmuller, Anne Mendel, Jean-Luc Brun, Hajanarina Rakotomahenina, Lise Preaubert
OBJECTIVE: The aim of the study was to determine which mathematical formula of specimen dimensions is the most accurate method of determining volume of the excised specimen at loop excision of the transformation zone. MATERIALS AND METHODS: A multicenter prospective observational study was conducted. A total of 258 patients who had a loop excision of the transformation zone performed as treatment of cervical intraepithelial neoplasia 2-3 were included. The dimensions and the volume of the specimen were measured at the time of the procedure, before formaldehyde fixation...
November 30, 2016: Journal of Lower Genital Tract Disease
https://www.readbyqxmd.com/read/27905399/cellular-reactions-to-long-term-volatile-organic-compound-voc-exposures
#11
Johanna M Gostner, Johannes Zeisler, Mohammad Tauqeer Alam, Peter Gruber, Dietmar Fuchs, Kathrin Becker, Kerstin Neubert, Markus Kleinhappl, Stefan Martini, Florian Überall
Investigations of cellular processes initiated by volatile organic compounds (VOCs) are limited when modelling realistic long-term exposure scenarios at low concentrations. Exposure to indoor VOCs is associated with a range of adverse effects, but data on molecular changes at regulatory threshold limits are lacking. Activity analysis of VOC in vitro can be a valuable complement to inhalation toxicological evaluations. We developed an exposure platform that generates a stable VOC atmosphere and allows the exposure of cells for longer periods...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27905291/two-cases-of-myiasis-of-middle-ear-caused-by-sarcophaga
#12
Erdal Polat, Serhat Sirekbasan, Hakkı Caner İnan
Middle ear myiasis and factors determining the types of flies. To the laboratory in saline with 10% formaldehyde and sent them larvae stereo-microscope (Olympus 10×) were examined. Adult by making one portion of the surviving larvae instar larvae and adults are defined utilizing state properties. The larvae and live larvae of the fly Sarcophaga sp. rendered adults were determined. In both patients, the middle ear causing myiasis flies species Sarcophaga sp. was determined to be.
September 2016: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/27903088/enhanced-thermal-properties-with-graphene-oxide-in-the-urea-formaldehyde-microcapsules-containing-paraffin-pcms
#13
Zhen Qiao, Jian Mao
In this study, compact urea-formaldehyde microcapsules containing paraffin (UFP) phase change materials (PCMs) were prepared via in situ polymerization. The thermal conductivity of the PCMs was enhanced without influencing their enthalpy by adding graphene oxide (GO). Two modification methods were investigated: One in which GO is added to the inside of microcapsules, defined as "paraffin/GO@UF composite"; and another in which GO is coated onto the surface of shell, defined as "paraffin@UF/GO composite". The GO sheets were visible in SEM images of paraffin@UF/GO composite...
December 1, 2016: Journal of Microencapsulation
https://www.readbyqxmd.com/read/27902914/inactivation-of-avian-influenza-virus-in-nonpelleted-chicken-feed
#14
H Toro, V L van Santen, C Breedlove
Corn stored outside could become contaminated with avian influenza virus (AIV) from wild bird droppings. AIV-contaminated ingredients could pass into the poultry flocks in nonpelleted chicken feed. The efficacy of two disinfectants at inactivating AIV in chicken feed was evaluated. Both Termin-8 (a blend of formaldehyde, propionic acid, terpenes, and surfactant) and Finio (a blend of approved phytochemicals and carboxylic acids) effectively inactivated AIV in chicken feed. Because stability of infectious AIV in chicken feed is limited, we evaluated addition of protein (skim milk powder) to the virus suspension...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27896884/contact-allergy-to-preservatives-essca-results-with-the-baseline-series-2009-2012
#15
Ana M Giménez-Arnau, Gustavo Deza, Andrea Bauer, Graham A Johnston, Vera Mahler, Marie-Louise Schuttelaar, Javier Sanchez-Perez, Juan Francisco Silvestre, Mark Wilkinson, Wolfgang Uter
BACKGROUND: Allergic contact dermatitis caused by biocides is common, and causes significant patient morbidity. OBJECTIVE: To describe the current frequency and pattern of patch test reactivity to biocide allergens included in the baselines series of most European countries. METHODS: Data collected by the European Surveillance System on Contact Allergies (ESSCA) network between 2009 and 2012 from 12 European countries were analysed. RESULTS: Methylisothiazolinone 0...
November 29, 2016: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/27894690/a-systematic-review-of-the-association-between-occupational-exposure-to-formaldehyde-and-effects-on-chromosomal-dna-damage-measured-using-the-cytokinesis-block-micronucleus-assay-in-lymphocytes
#16
REVIEW
Michael Fenech, Armen Nersesyan, Siegfried Knasmueller
Formaldehyde (FAL) is classified as a Class I carcinogen by the WHO International Agency for Research on Cancer. Therefore, there is a need to validate appropriate methods for detecting its genotoxic effects in vivo in humans. One of the most commonly used methods to measure the genotoxic effects of exposure to environmental chemicals is the lymphocyte cytokinesis-block micronucleus (L-CBMN assay). We performed a systematic review and statistical analysis of the results from all of the published studies in which the L-CBMN assay was used to measure the genotoxic effects of human exposure to FAL...
October 2016: Mutation Research
https://www.readbyqxmd.com/read/27889339/preparation-and-copper-ions-adsorption-properties-of-thiosemicarbazide-chitosan-from-squid-pens
#17
Yue-Cheng Lin, Hong-Peng Wang, Faryal Gohar, Muhammad Haseeb Ullah, Xiang Zhang, Dong-Fang Xie, Hui Fang, Jun Huang, Jun-Xing Yang
Chitosan was prepared by alkaline N-deacetylation of β-chitin from squid pens. Thiosemicarbazide group was introduced to chitosan via formaldehyde-derived linkages, and thiosemicarbazide chitosan (TSFCS) with different degrees of substitution (DS) was synthesized. The DS values of TSFCS calculated by elemental analysis were 0.19, 0.36 and 0.63. The structure of the TSFCS was confirmed by elemental analysis, FTIR, XRD, TGA and SEM. The adsorption capacity of Cu(II) ions by TSFCS showed good correlation with the DS and pH (pH range 2...
November 24, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27888496/methanol-gas-sensing-properties-of-swcnt-mip-composites
#18
Jin Zhang, Qin Zhu, Yumin Zhang, Zhongqi Zhu, Qingju Liu
The single-walled carbon nanotube (SWCNT)-molecularly imprinted powder (MIP) composites in this paper were prepared by mixing SWCNTs with MIPs. The structure and micrograph of the as-prepared SWCNTs-MIPs samples were characterized by XRD and TEM. The gas-sensing properties were tested through indirect-heating sensors based on SWCNT-MIP composites fabricating on an alumina tube with Au electrodes and Pt wires. The results showed that the structure of SWCNTs-MIPs is of orthogonal perovskite and the average particle size of the SWCNTs-MIPs was in the range of 10-30 nm...
December 2016: Nanoscale Research Letters
https://www.readbyqxmd.com/read/27886076/pathogens-inactivated-by-low-energy-electron-irradiation-maintain-antigenic-properties-and-induce-protective-immune-responses
#19
Jasmin Fertey, Lea Bayer, Thomas Grunwald, Alexandra Pohl, Jana Beckmann, Gaby Gotzmann, Javier Portillo Casado, Jessy Schönfelder, Frank-Holm Rögner, Christiane Wetzel, Martin Thoma, Susanne M Bailer, Ekkehard Hiller, Steffen Rupp, Sebastian Ulbert
Inactivated vaccines are commonly produced by incubating pathogens with chemicals such as formaldehyde or β-propiolactone. This is a time-consuming process, the inactivation efficiency displays high variability and extensive downstream procedures are often required. Moreover, application of chemicals alters the antigenic components of the viruses or bacteria, resulting in reduced antibody specificity and therefore stimulation of a less effective immune response. An alternative method for inactivation of pathogens is ionizing radiation...
November 23, 2016: Viruses
https://www.readbyqxmd.com/read/27883238/striking-doping-effects-on-thermal-methane-activation-mediated-by-the-heteronuclear-metal-oxides-xalo%C3%A2-%C3%A2-x-v-nb-and-ta
#20
Xiao-Nan Wu, Jilai Li, Maria Schlangen, Shaodong Zhou, Patricio González-Navarrete, Helmut Schwarz
The thermal reactivity of the heteronuclear metal-oxide cluster cations [XAlO₄]·+ (X = V, Nb and Ta) towards methane has been studied by using mass spectrometry in conjunction with quantum mechanical calculations. Experimentally, hydrogen-atom transfer (HAT) from methane is mediated by all the three oxide clusters at ambient conditions. However, [VAlO₄]·+ is unique in that this cluster transforms directly methane into formaldehyde. The absence of this reaction for the Nb and Ta analogues demonstrates a striking doping effect on the chemoselectivity in the conversion of methane...
November 24, 2016: Chemistry: a European Journal
keyword
keyword
50716
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"